Valve-motion.



"No, 731,699. PATENTED JUNE 23,1903.

P. LORANGE.

VALVE MOTION.

APPLICATION FILED SEPT. 25, 1902.

no uonnn.

/l/ II A tion.

. UNITED STATES Patented June 23, 1903.

PATENT OFFICE.

VALVE-MOTION.

SPECIFICATION forming-part of Letters Patent No. 731,699, dated June 23, 1903. Application filed September 25,1902. Serial No. 124,765. (No model-3 of this application is intended to insure the regular closing of the valve and the simplest form of valve construction.

In the drawings, Figure 1 is a sectional view of a valve apparatus embodying this inven- Fig. 2 shows a sectionalview of a modified form of valve. l

Fig. 1 shows the arrangement in connection with the pressure-valve of a compressor. The valve A is an ordinary spindle-valve,

the guide-casing a of which is closed at the upper end by the head 9 and made tight against the guide-support b by grinding. The latter is connected with the valve-seat B by means of ribs, is extended below the seat, andtightly seated below in the side of the cylinder. A boring c c connects theupper end surface of the support 11 with the hole (1 in the inner wall of the cylinder. The diameter of this hole can be altered at will by means of the screw e. The distance of the holecl from the middle of the cylinder is so calcuto say, with the suction-chamber. The operationofthe valve-motion is as follows: As soon as the pressure in the Working cylinder is equal to the pressure above the valve the valve begins to open automatically and after completing its stroke lies against a stop. The space formed between the head g by the diameter of the guide-support.

wise-guided valve.

and theupper end surface of the guide-support I) is first placed in communication with the compression end of the working piston.

Shortly before the end of the stroke, however,

the working piston slides beyond the hole (1 and the back of the piston-ring directs the flow of air which is below the head 9 into the suction end of the working cylinder. The pressure below the head 9 disappears and the pressure bearing upon it in the pressurechamber presses the valve onto its seat again with a force equal to this pressure multiplied The rapidity with which this is efiected can be regulated by adjustment of the screw e. The pair of cylinders which produce the valvemotion and in the present example take the form of a guide can also be made as an independent organ and connected with the other- The. valve-guiding contrivance used for the actuating can equally well be placed below as above the level of the valve-seat, Fig. 2. .Havingnow fully described my-invention What I claim, and desire to secure by Letters Patent, is- The combination of the valve A, the guidecasing a closed at its upper end, the working cylinder and piston, the guide-support extending beneath the valve-seat, the passage 0, d, connecting the upper end of the guidesupport with the working cylinder and opening at a point where the piston will slightly pass it in the compressing stroke, and the adj usting-screw e for regulating theefliective diameter of the passage. i

In testimony whereof I have hereunto set my hand in presence of two witnesses.

PROSPER LORANGE. Witnesses:

AUGUST SCHWANSEN, M. HAUNCHE. 

